re-introduce the toolkit preparation logicto make sure that enaml and
chaco/enaml are using the same toolkit.
Handle the case where the user has set ETS_TOOLKIT to wx.
correct the ets_toolkit name for qt
pep8
minor update on the help string
minor correction
fix issues with returning the'default' instead of 'qt'
more cleanup
Fix enaml_toolkit not defined error
rework code to present the behaviour better.
Update enaml/runner.py

Make the logic in prepare_toolkit a bit easier to follow.
Update enaml/runner.py

fix typo
Fix typo and updated warning message
Merge pull request #230 from enthought/sync-enaml-with-chaco

Sync enaml with chaco